Growth and properties of Li,Ta modified (K,Na)NbO3 lead‐free piezoelectric single crystals |
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| Authors: | Xiaoqing Huo Limei Zheng Shujun Zhang Rui Zhang Gang Liu Rui Wang Bin Yang Wenwu Cao Thomas R Shrout |
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| Institution: | 1. Harbin Institute of Technology, Condensed Matter Science and Technology Institute, Harbin 150080, P.R. China;2. Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA;3. Harbin Institute of Technology, Condensed Matter Science and Technology Institute, Harbin 150080, P.R. ChinaPhone: +86 451 86402797, Fax: +86 451 86402797;4. Department of Chemistry, Harbin Institute of Technology, Harbin 150001, P.R. China |
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| Abstract: | Li, Ta modified (K,Na)NbO3 single crystals with the size of 18 mm × 18 mm × 10 mm were successfully grown by top‐seeded solution growth method, with orthorhombic–tetra‐gonal phase transition temperature ～79 °C and Curie temperature ～276 °C. The electromechanical coupling factors k33 and kt were found to be ～88% and ～65%, respectively. The piezoelectric coefficient d33 for the 001]c poled crystals reached 255 pC/N. In addition, the electromechanical coupling factor exhibited high stability over the temperature range of –50 °C to 70 °C, making these lead free crystals good candidates for electromechanical applications. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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| Keywords: | lead‐free KNN single crystals electromechanical coupling factor thermal stability |
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